Differential pin lock



FIG. 1 is a perspective view of a differential pin lock showing our new design;

FIG. 2 is front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side view, the left side being a mirror image;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a back elevational view thereof. 

CLAIM The ornamental design for a differential pin lock, as shown and described. 